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Finding the Fourth Proportional to 62,139.60, 85,756.68 and 36,985.68

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Solution

The fourth proportional to 62,139.60, 85,756.68 and 36,985.68 is: 51,042.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,139.60 : 85,756.68 = 36,985.68 : x
  2. Step 2: Convert to fraction form
    62,139.60/85,756.68 = 36,985.68/x
  3. Step 3: Cross multiply
    62,139.60x = 85,756.68 × 36,985.68
  4. Step 4: Simplify right side
    62,139.60x = 3,171,769,124.34
  5. Step 5: Solve for x
    x = 3,171,769,124.34/62,139.60
  6. Step 6: Final answer
    x = 51,042.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.